CA GRADE 2 WASTEWATER TREATMENT OPERATOR PRACTICE EXAM 1|UPDATED&VERIFIED|100% SOLVED
1 mg/l is the same as 1 part per billion ✔️F
A scada system is capable of monitoring and controlling equipment from where? ✔️remote location
A Discharge Monitoring Report is typically submitted to the regulatory agency on daily basis ✔️False = Monthly
A mechanical seal is used to prevent leaks between where? ✔️between the pump casing and shaft
Alkalinity is the capacity of a liquid to neutralize base ✔️False = Alkalinity neutralizes acids
Typical mixed liquor suspended solids concentration is? ✔️1,000 to 4,500 mg/l
Turbidity is caused by... ✔️suspended matters
Algae is not essential to the successful operation of both aerobic and facultative ponds ✔️False = Algae supply most of the oxygen to the
supernattant
The addition of acid and CO2 will do what to wastewater? ✔️lower the pH of wastewater
Hydrogen sulfide will deteriorate what kind of structures? ✔️concrete structures
The higher the pH, the better the disinfection ✔️False =
Maintain a dissolved oxygen concentration of 12 to 14 mg/l in the aeration tank ✔️F
What happens when the velocity of the wastewater in a clarifier is greater in some sections than others? ✔️short circuiting
The F/M ratio will decrease when the microorganism population____________in the aeration tank? ✔️increases
Algae growth will be faster when there is less sunlight ✔️F
How do higher temps affection disinfectione rates? ✔️Disinfection increases at higher temps
One of the benefits of recirculation for a trickling filter is that it drcreses the contact time of the wastewater with the biological film ✔️F
How do you prevent foaming from recurring in a anaerobic digester? ✔️Maintaining a constant temperature
Preventative maintenence is a proactive, programmed, and...... ✔️systematic approach to maintenance
Abnormal operation in a pond will not occur if it is overloaded with BOD ✔️F
Anaerobic decomposition of sweage will release? ✔️hydrogen sulfide
Always pour water into acid, and never the other way around ✔️F
Scum escaping in the clarifier effluent could be caused by what? ✔️hydraulic overload
Operate an activated sludge system at low MCRT if you have what? ✔️limited aeration capacity
Chlorine gas is brown in color ✔️False = yellow green
Typical suspended solids concentration of domestic influent wastewater is? ✔️150 to 400 mg/l
Poor ventilation of a trickling filter could lead to what? ✔️lead to odor problems
Sulfur dioxide is used to dechlorinate the effluent prior to discharge to protect what? ✔️aquatic organisms in the recieving waters
MRCT describes the average residence time of the activated sludge particle in the return sludge pipe ✔️F
Free chlorine combines with water to form? ✔️hypochlorous and hydrochloric acids
The trickling filter can be controlled by changing the loadings based on sludge age F/M ratio or MCRT ✔️F
1 mg/l is the same as 1 part per billion ✔️F
A scada system is capable of monitoring and controlling equipment from where? ✔️remote location
A Discharge Monitoring Report is typically submitted to the regulatory agency on daily basis ✔️False = Monthly
A mechanical seal is used to prevent leaks between where? ✔️between the pump casing and shaft
Alkalinity is the capacity of a liquid to neutralize base ✔️False = Alkalinity neutralizes acids
Typical mixed liquor suspended solids concentration is? ✔️1,000 to 4,500 mg/l
Turbidity is caused by... ✔️suspended matters
Algae is not essential to the successful operation of both aerobic and facultative ponds ✔️False = Algae supply most of the oxygen to the
supernattant
The addition of acid and CO2 will do what to wastewater? ✔️lower the pH of wastewater
Hydrogen sulfide will deteriorate what kind of structures? ✔️concrete structures
The higher the pH, the better the disinfection ✔️False =
Maintain a dissolved oxygen concentration of 12 to 14 mg/l in the aeration tank ✔️F
What happens when the velocity of the wastewater in a clarifier is greater in some sections than others? ✔️short circuiting
The F/M ratio will decrease when the microorganism population____________in the aeration tank? ✔️increases
Algae growth will be faster when there is less sunlight ✔️F
How do higher temps affection disinfectione rates? ✔️Disinfection increases at higher temps
One of the benefits of recirculation for a trickling filter is that it drcreses the contact time of the wastewater with the biological film ✔️F
How do you prevent foaming from recurring in a anaerobic digester? ✔️Maintaining a constant temperature
Preventative maintenence is a proactive, programmed, and...... ✔️systematic approach to maintenance
Abnormal operation in a pond will not occur if it is overloaded with BOD ✔️F
Anaerobic decomposition of sweage will release? ✔️hydrogen sulfide
Always pour water into acid, and never the other way around ✔️F
Scum escaping in the clarifier effluent could be caused by what? ✔️hydraulic overload
Operate an activated sludge system at low MCRT if you have what? ✔️limited aeration capacity
Chlorine gas is brown in color ✔️False = yellow green
Typical suspended solids concentration of domestic influent wastewater is? ✔️150 to 400 mg/l
Poor ventilation of a trickling filter could lead to what? ✔️lead to odor problems
Sulfur dioxide is used to dechlorinate the effluent prior to discharge to protect what? ✔️aquatic organisms in the recieving waters
MRCT describes the average residence time of the activated sludge particle in the return sludge pipe ✔️F
Free chlorine combines with water to form? ✔️hypochlorous and hydrochloric acids
The trickling filter can be controlled by changing the loadings based on sludge age F/M ratio or MCRT ✔️F
